As of Sunday evening, the High Park Fire burning Larimer County, Colorado continues to burn out of control -- more than 20,000 acres have been scorched already and Larimer County Sheriff Justin Smith says there is little hope for containment anytime soon.

"We have no hope for containment today," Smith said during a media briefing about the fire. "Mother Nature is driving this fire. All we can do is get people out of the way."

Smith also said that the 250 firefighters on scene are doing everything they can to battle the blaze with the support of several air tankers and helicopters. Additional ground, air and fire engines have been ordered for Monday, according to InciWeb.org.

"This is the fire a lot of folks in Larimer County have always been worried about," Gov. John Hickenlooper said after touring the scene of the fire, The Denver Post reports. "We are throwing everything at it we can." Gov. Hickenlooper signed an executive order requesting National Guard support for fire relief efforts.

To put the size of the fire into perspective -- at 20,000 acres, the fire is nearly the same size as the entire city of Boulder, Colorado, according to The Denver Post.

For the latest official maps of the fire, updates on closed roads and evacuations visit InciWeb.org.

LOOK: Photos, video from the High Park Fire below.

High Park Fire, Northwest Of Fort Collins, Colorado

High Park Fire, Northwest Of Fort Collins, Colorado

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A birdfeeder hangs in front of a home d

A birdfeeder hangs in front of a home destroyed by the High Park Fire, in Bellvue, Colorado west of Fort Collins June 30, 2012. The High Park Fire burned more than 87,000 acres and left one person dead and destroyed 259 homes making it the second-largest and second-most destructive fire in Colorado state history. The High Park Fire is 97 percent contained while the Waldo Canyon Fire, which has burned more than 17,000 acres, left at least two people dead and destroyed 346 homes is 45 percent contained. AFP PHOTO / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/GettyImages)